1. Professor Emeritus, Hokkaido University, Sapporo, Japan
2. Graduate School of Bio-Medical Engineering, Tohoku University, Sendai, Japan
3. Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan
4. Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
5. Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
6. School of Dentistry, Birmingham University, Birmingham, UK